The environment of Arabia served as a form of protection during much of the region's history primarily due to the extreme heat and dry conditions. The harsh climate, characterized by high temperatures and arid landscapes, made it difficult for large armies to sustain themselves in the region. The scarcity of water and resources deterred potential invaders, as campaigns in such an inhospitable environment would have been challenging and costly.
Additionally, the vast deserts and rugged terrain created natural barriers that limited movement and access, further protecting the area from external threats. While oases did provide some agricultural opportunities, the general inhospitable nature of the Arabian Peninsula was more influential in providing a form of protection throughout much of its history.